Projection light source and projection apparatus

Abstract

A projection light source (100) and a projection apparatus. The projection light source (100) comprises a three-color laser light source (101); a red LED light source (102); a blue laser light source (103); a phosphor plate (104) arranged on a light-emitting side of the blue laser light source (103) and used for converting blue laser light into green fluorescence; and a compound-eye module (105) arranged on light-emitting sides of the three-color laser light source (101), the red LED light source (102) and the phosphor plate (104), the compound-eye module (105) being used for homogenizing red laser light, blue laser light, green laser light, red light and green fluorescence and then transmitting same.

Description

Projection light source and projection device

[0001] The present application claims priority to the Chinese patent application No. 202410841986.9, filed on June 26, 2024, and entitled "Projection light source and projection device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of optical equipment, in particular to a projection light source and a projection device. BACKGROUND

[0003] In the field of projection display, the projection light source is an important component of the projection system. The traditional projection light source includes a Xenon light source, an Ultra High Pressure (UHP) gas discharge lamp light source, an LED (Light Emitting Diode) light source, a laser-excited phosphor light source, a laser (RGB Laser / single dual three-color) light source, etc. The traditional light bulb is less and less used due to its own defects, while the LED light source, the laser-excited phosphor light source, and the laser and other new light sources show excellent characteristics in brightness, color, life, energy consumption, etc., and gradually become the mainstream of the projection display light source. TECHNICAL PROBLEM

[0004] Although the laser light source has high brightness and high color gamut, the laser has strong coherence and has speckle problems, which will affect the viewing comfort. The wide-spectrum light source is difficult to achieve high brightness and high color gamut, and will also affect the projection picture quality effect. Therefore, the existing projection light source has been difficult to meet the increasing requirements of everyone for the projection picture quality, which will affect the user's viewing effect and use experience of the picture. TECHNICAL SOLUTION

[0005] In a first aspect, an embodiment of the present application provides a projection light source, comprising:

[0006] a three-color laser light source, configured to emit red laser light, blue laser light, and green laser light;

[0007] a red LED light source, configured to emit red light;

[0008] a blue laser light source, configured to emit blue laser light;

[0009] a phosphor plate, disposed on the light emitting side of the blue laser light source, configured to convert the blue laser light into green fluorescent light;

[0010] The compound eye module is arranged on the light emitting side of the three-color laser light source, the red LED light source and the phosphor plate, and is used for transmitting the red laser, the blue laser, the green laser, the red light and the green fluorescent light after uniform light.

[0011] In a second aspect, the embodiments of the present application further provide a projection device, comprising a projection light source and a display chip, wherein the display chip is arranged on the light emitting side of the projection light source, and the projection light source comprises:

[0012] a three-color laser light source, which is used for emitting red laser, blue laser and green laser;

[0013] a red LED light source, which is used for emitting red light;

[0014] a blue laser light source, which is used for emitting blue laser;

[0015] a phosphor plate, which is arranged on the light emitting side of the blue laser light source and is used for converting the blue laser into green fluorescent light;

[0016] a compound eye module, which is arranged on the light emitting side of the three-color laser light source, the red LED light source and the phosphor plate, and is used for transmitting the red laser, the blue laser, the green laser, the red light and the green fluorescent light after uniform light. Advantages

[0017] In the projection light source and the projection device provided by the embodiments of the present application, the projection light source not only has a three-color laser light source, but also has a red LED light source and a blue laser light source, wherein the blue laser is converted into green fluorescent light by the phosphor plate. The green fluorescent light and the red light are different from the laser, and do not have the speckle problem. Therefore, after the green fluorescent light, the red light and the three-color laser are mixed in the compound eye module, the high brightness and the high color gamut of the three-color laser light source can be maintained, and the green fluorescent light and the red light can be supplemented, so that a real continuous ultra-wide spectrum light source is realized, a real speckle-free light source system is achieved, the viewing comfort of the human eye is greatly enhanced, and a more healthy viewing environment is provided for users. BRIEF DESCRIPTION OF DRAWINGS

[0018] FIG. 1 is a first structure schematic diagram of the projection light source provided by the embodiments of the present application.

[0019] FIG. 2 is a spectrum diagram of the red laser provided by the embodiments of the present application.

[0020] FIG. 3 is a spectrum diagram of the green laser provided by the embodiments of the present application.

[0021] FIG. 4 is a spectrum diagram of blue laser provided by an embodiment of the present application;

[0022] FIG. 5 is a spectrum diagram of green fluorescence provided by an embodiment of the present application;

[0023] FIG. 6 is a spectrum diagram of red light emitted by a red LED light source provided by an embodiment of the present application.

[0024] FIG. 7 is a spectrum diagram of red, green and blue laser light provided by an embodiment of the present application.

[0025] FIG. 8 is a spectrum diagram of red laser light, green laser light, blue laser light, red light and green fluorescence light of a projection light source provided by an embodiment of the present application.

[0026] FIG. 9 is a first structure diagram of a laser fluorescence light combining element provided by an embodiment of the present application.

[0027] FIG. 10 is a second structure diagram of a laser fluorescence light combining element provided by an embodiment of the present application.

[0028] FIG. 11 is a third structure diagram of a laser fluorescence light combining element provided by an embodiment of the present application.

[0029] FIG. 12 is a fourth structure diagram of a laser fluorescence light combining element provided by an embodiment of the present application.

[0030] FIG. 13 is a second structure diagram of a projection light source provided by an embodiment of the present application.

[0031] Embodiments of the present application

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] The embodiments of the present application provide a projection light source and a projection device, which have high brightness and high color gamut, and can suppress the speckle problem caused by strong coherence of laser. The specific description will be given below with reference to the drawings.

[0034] Please refer to FIG. 1, which is a first structure diagram of a projection light source provided by an embodiment of the present application.

[0035] The embodiment of the present application provides a projection light source 100, which comprises at least three light source assemblies: a three-color laser light source assembly, a red LED light source assembly and a green fluorescent light source assembly. As the name implies, the three-color laser light source assembly is used to emit red laser light, blue laser light and green laser light; the red LED light source assembly is used to emit red light; and the green fluorescent light source assembly is used to emit green fluorescent light. The three-color laser light, the red light and the green fluorescent light are mixed together to form white light, and the green fluorescent light and the red light do not have the speckle problem, so that the green fluorescent light, the red light and the three-color laser light can maintain the high brightness and the high color gamut of the three-color laser light source 101, and can also supplement the green fluorescent light and the red light, further enhancing the brightness and inhibiting the speckle problem caused by the strong coherence of the laser.

[0036] More specifically, the projection light source 100 comprises a three-color laser light source 101, a red LED light source 102, a blue laser light source 103, a fluorescent powder plate 104 and an eye module 105.

[0037] The three-color laser light source 101 is used to emit red laser light, blue laser light and green laser light.

[0038] The red LED light source 102 is used to emit red light.

[0039] The blue laser light source 103 is combined with the fluorescent powder plate 104 to emit green fluorescent light. Specifically, the blue laser light source 103 is used to emit blue laser light, and the fluorescent powder plate 104 is arranged on the light emitting side of the blue laser light source 103. The blue laser light is emitted to the fluorescent powder plate 104, and the fluorescent powder on the fluorescent powder plate 104 is excited by the blue laser light to form green fluorescent light. In the embodiment, the fluorescent powder plate 104 can further comprise a support substrate, a reflective film layer and a fluorescent powder layer. The support substrate is arranged between the fluorescent powder and the reflective film layer, and is used as a carrier of the reflective film layer and the fluorescent powder, and can be a glass substrate or a plastic substrate. In the embodiment, the fluorescent powder plate 104 can be provided with or without a reflective film layer according to the requirement, and the reflective film layer can improve the utilization rate of the light beam. It can be understood that the green fluorescent light obtained by exciting the fluorescent powder by the blue laser light source 103 is more pure than directly using green fluorescent light. The blue laser light source 103 has high power and high conversion efficiency for converting into green fluorescent light.

[0040] The eye module 105 is arranged on the light emitting side of the three-color laser light source 101, the red LED light source 102 and the fluorescent plate, that is, downstream of the light emitting of the three, and is used to mix and homogenize the three-color laser light, the red light and the green fluorescent light to form white light.

[0041] As shown in FIG. 2 to FIG. 7, FIG. 2 is a spectrum diagram of the red laser provided in the embodiment of the present application, FIG. 3 is a spectrum diagram of the green laser provided in the embodiment of the present application, FIG. 4 is a spectrum diagram of the blue laser provided in the embodiment of the present application. FIG. 5 is a spectrum diagram of the green fluorescence provided in the embodiment of the present application, FIG. 6 is a spectrum diagram of the red light emitted by the red LED light source 102 provided in the embodiment of the present application, FIG. 7 is a spectrum diagram of the combined light of the red laser, the green laser and the blue laser provided in the embodiment of the present application, and FIG. 8 is a spectrum diagram of the combined light of the red laser, the green laser, the blue laser, the red light and the green fluorescence of the projection light source 100 provided in the embodiment of the present application. As can be seen from FIG. 7 and FIG. 8, compared with the diagram of the combined light of only the three-color laser, the projection light source 100 provided in the embodiment of the present application has a continuous super-wide spectrum.

[0042] Therefore, in the projection light source 100 and the projection device provided in the embodiment of the present application, the projection light source 100 not only has the three-color laser light source 101, but also has the red LED light source 102 and the blue laser light source 103, wherein the blue laser is converted into the green fluorescence by the phosphor plate 104. The green fluorescence and the red light are different from the laser, and there is no speckle problem, so after the green fluorescence, the red light and the three-color laser are mixed in the compound eye module 105, the high brightness and the high color gamut of the three-color laser light source 101 can be maintained, and the green fluorescence and the red light can be supplemented, so as to realize a real continuous super-wide spectrum light source of the light source, achieve a real light source system close to no speckle, greatly enhance the viewing comfort of the human eye, and provide a more healthy viewing environment for the user. In some embodiments, as shown in FIG. 1, in order to improve the spatial arrangement position of the three-color laser light source 101, the red LED light source 102, the blue laser light source 103, the phosphor plate 104 and the compound eye module 105, the projection light source 100 further comprises a laser fluorescence combined light element 106, and the laser fluorescence combined light element 106 is provided with a reflecting surface on the side facing the phosphor plate 104 and the red LED light source 102, and the reflecting surface is used for reflecting the green fluorescence and the red light to the compound eye module 105. The laser fluorescence combined light element 106 is provided with a through hole 1061, and the red laser, the blue laser and the green laser can pass through the through hole 1061 and be emitted to the compound eye module 105. In the embodiment of the present application, at least part of the red laser, the blue laser and the green laser pass through the through hole 1061 and are emitted to the compound eye module 105.

[0043] Please refer to FIG. 9, FIG. 10 and FIG. 11, FIG. 9 is a first structure diagram of the laser fluorescence light combination element provided by the embodiment of the present application, FIG. 10 is a second structure diagram of the laser fluorescence light combination element provided by the embodiment of the present application, and FIG. 11 is a third structure diagram of the laser fluorescence light combination element provided by the embodiment of the present application. The laser fluorescence light combination element 106 comprises a transparent substrate 1064 and a reflective film 1063, the reflective film 1063 is arranged on one side of the transparent substrate 1064, and the reflective film 1063 is provided with a through hole 1061 or a region film layer 1062. The reflective film 1063 is towards the light emitting side of the fluorescent powder plate 104 and the red LED light source 102, and the reflective film 1063 is also formed as the above-mentioned reflecting surface, and the light can be emitted to the compound eye module 105 through the through hole 1061 or the region film layer 1062.

[0044] As shown in FIG. 10, when the reflective film 1063 is provided with the through hole 1061 (marked as a first through hole 1061a), the transparent substrate 1064 is provided with a second through hole 1064a, the first through hole 1061a and the second through hole 1064a are communicated, and the light can be emitted to the compound eye module 105 through the second through hole 1064a and the first through hole 1061a in turn.

[0045] As shown in FIG. 11, when the reflective film 1063 is provided with the region film layer 1062, the region film layer 1062 can be a first anti-reflection film, so as to improve the transmittance of the red laser, the blue laser and the green laser through the laser fluorescence light combination element 106, that is, the first anti-reflection film is arranged on the transparent substrate 1064, the reflective film 1063 is arranged around the region film layer 1062, and the light can enter the compound eye module 105 through the transparent substrate 1064 and the region film layer 1062 in turn.

[0046] Please refer to FIG. 12, which is a fourth structure diagram of the laser fluorescence light combination element provided by the embodiment of the present application. In order to further improve the light transmittance, the projection light source further comprises a second anti-reflection film 1065, the second anti-reflection film 1065 is arranged on the side of the transparent substrate 1064 away from the reflective film 1063, the projection of the second anti-reflection film 1065 on the transparent substrate 1064 is greater than or equal to the projection of the region film layer 1062 on the transparent substrate 1064, and the light can enter the compound eye module 105 through the second anti-reflection film 1065, the transparent substrate 1064 and the region film layer 1062 in turn.

[0047] In order to make as many light rays as possible pass through the through hole 1061 and exit to the compound eye module 105, please refer to FIG. 13, which is a second structural schematic diagram of the projection light source provided by the embodiment of the present application. The projection light source 100 further comprises a focusing lens unit 107, which can be a focusing lens group and a focusing lens. The focusing lens unit 107 is arranged between the three-color laser light source 101 and the laser fluorescence light combining element 106. The focusing lens unit 107 is used to adjust the size of the light beam emitted by the three-color laser light source 101 on the laser fluorescence light combining element 106. It can be understood that if there is no through hole 1061 arranged on the laser fluorescence light combining element, the light beam emitted by the three-color laser light source 101 will form a light spot on the laser fluorescence light combining element, and then the size of the light spot can be adjusted by the focusing lens unit 107. In the present application, in order to make as many red laser light, blue laser light and green laser light as possible pass through the through hole 1061, the cross-sectional area of the light beam can also be adjusted by the focusing lens unit 107 to improve the light intensity.

[0048] The number of the focusing lens unit 107 can be single or multiple, which can be set according to actual conditions, and the embodiment does not limit it.

[0049] If the distance between the three-color laser light source 101 and the laser fluorescence light combining element 106 is long, the projection light source 100 further comprises a first relay lens 109, which can be arranged between the three-color laser light source 101 and the laser fluorescence light combining element 106 to correct the angle of light, avoid light deflection, and thus avoid the loss caused by the deviation of part of the light, so as to correct the light path and improve the utilization rate of light.

[0050] In some cases, the number of the focusing lens unit 107 is single, and the first relay lens 109 is arranged between the focusing lens unit 107 and the three-color laser light source 101. In other cases, the number of the focusing lens unit 107 is multiple, and the first relay lens 109 is arranged at least on the side of one of the focusing lens units 107 close to the three-color laser light source 101. The reason for arranging the first relay lens 109 is that the first relay lens 109 acts as an auxiliary lens and is arranged before the light entrance side of the focusing lens unit 107 to maintain as many light rays as possible into the focusing lens unit 107 for convergence of the focusing lens unit 107.

[0051] The projection light source 100 further comprises a first light uniformizing element 108 arranged between the focusing lens unit 107 and the three-color laser light source 101.

[0052] Due to the laser light emitted by the three-color laser light source 101, the coherence of the laser light is excellent, and the first light homogenizing element 108 can disperse the point light source emitted by the three-color laser light source 101 into a surface light source to improve the visual effect.

[0053] In some embodiments, the projection light source 100 further comprises a light splitting mirror 110, which has opposite first and second light splitting surfaces 1101 and 1102. The first light splitting surface 1101 is directed towards the blue laser light source 103 and the fluorescent powder plate 104, and the second light splitting surface 1102 is directed towards the laser fluorescence light combining element 106. The blue laser light is reflected by the first light splitting surface 1101 to the fluorescent powder plate 104, and the green fluorescent light emitted by the fluorescent powder plate 104 is transmitted from the first light splitting surface 1101 to the second light splitting surface 1102, and then reflected by the laser fluorescence light combining element 106 to the compound eye module 105. As can be seen, the light splitting mirror 110 can be a red-blue reflecting and green transmitting film, which has the functions of selective transmission and selective reflection. By providing the light splitting mirror 110, the positions of the blue laser light source 103 and the fluorescent powder plate 104 can be reasonably arranged, which is beneficial to the miniaturization of the projection light source 100.

[0054] The second light splitting surface 1102 is directed towards the red LED light source 102, and the red light emitted by the red LED light source 102 is reflected by the second light splitting surface 1102 to the laser fluorescence light combining element 106, and then reflected by the laser fluorescence light combining element 106 to the compound eye module 105. As can be seen, by providing the light splitting mirror 110, the position of the red LED light source 102 can be reasonably arranged, and the light splitting mirror 110 can realize structural multiplexing, i.e. it can reflect blue laser light and red light, and also transmit green fluorescent light, which is beneficial to reducing the setting of other structures and the miniaturization of the projection light source 100. In addition, by providing the light splitting mirror 110, the green fluorescent light and the red light can be mixed in advance before entering the compound eye module 105, which is beneficial to improving the subsequent light homogenizing effect and improving the visual effect.

[0055] The projection light source 100 further comprises a first collimating lens group 111, which is arranged between the red LED light source 102 and the light splitting mirror 110. The first collimating lens can collimate the light emitted by the red LED light source 102 into parallel light, thereby improving the accuracy of light projection and avoiding the occurrence of invalid light.

[0056] The first collimating lens can include a plurality of convex or concave lenses with different diopters.

[0057] The projection light source 100 further comprises a second collimating lens set 112, which is arranged between the blue laser light source 103 and the beam splitter 110. The second collimating lens set 112 can collimate the light emitted by the blue laser light source 103 into parallel light, thereby improving the accuracy of light projection and avoiding invalid light.

[0058] Similarly, the second collimating lens set 112 can comprise a plurality of convex lenses or concave lenses with different refractive powers.

[0059] In some embodiments, the projection light source 100 further comprises a second relay lens 114, which is arranged between the blue laser light source 103 and the beam splitter 110 to correct the angle of light, thereby avoiding light deflection and avoiding the loss caused by the deviation of part of the light, and achieving the purposes of correcting the light path and improving the utilization rate of light.

[0060] Since the blue laser light source 103 emits laser light, the coherence of the laser light is excellent, and the point light source emitted by the blue laser light source 103 can be dispersed into a surface light source through the first light homogenizing element 108, thereby improving the visual effect.

[0061] The projection light source 100 further comprises a second relay lens 114, which is arranged between the blue laser light source 103 and the beam splitter 110 to correct the angle of light, thereby avoiding light deflection and avoiding the loss caused by the deviation of part of the light, and achieving the purposes of correcting the light path and improving the utilization rate of light.

[0062] The projection light source 100 further comprises a third collimating lens set 115, which is arranged between the phosphor plate 104 and the beam splitter 110. The third collimating lens set 115 can collimate the green fluorescence into parallel light, thereby improving the accuracy of light projection into the beam splitter 110 and avoiding invalid light.

[0063] Similarly, the third collimating lens set 115 can comprise a plurality of convex lenses or concave lenses with different refractive powers.

[0064] In some embodiments, the projection light source 100 further comprises a third relay lens 116, which is arranged between the laser fluorescence light combining element 106 and the beam splitter 110 to correct the angle of light, thereby avoiding light deflection and avoiding the loss caused by the deviation of part of the light, and achieving the purposes of correcting the light path and improving the utilization rate of light.

[0065] In the above embodiment, the fly-eye module 105 includes a fly-eye lens 1051 disposed at the light exit side of the three-color laser light source 101, the red LED light source 102, and the phosphor plate 104, and a fourth relay lens 1052 disposed at the light exit side of the fly-eye lens 1051. The fly-eye lens 1051 is configured to project the red laser light, the blue laser light, the green laser light, the red light, and the green fluorescent light after homogenization to the fourth relay lens 1052. The fourth relay lens 1052 corrects the light angle to avoid light deviation and the loss caused by the deviation of part of the light, thereby correcting the light path and improving the utilization rate of the light. The number of the fourth relay lens 1052 can be selected according to actual conditions, and the embodiment is not limited in this regard.

[0066] In the above embodiment, the number of the three-color laser light source 101 can be multiple. For some or all of the three-color laser light sources 101, a reflecting element 117 can be disposed at the light exit side of the three-color laser light source 101 to make the light paths of the multiple three-color laser light sources 101 consistent.

[0067] In the above embodiment, in the three-color laser light source assembly, the light emitted by the three-color laser light source 101 can sequentially pass through the first homogenizing element, the focusing lens unit 107, and the laser-fluorescent light combining element 106, and then enter the fly-eye module 105. In the red LED light source assembly, the light emitted by the red LED light source 102 can be collimated by the first collimating lens group 111, reflected by the beam splitter 110 to the laser-fluorescent light combining element 106, and then reflected by the laser-fluorescent light combining element 106 to the fly-eye module 105. In the green fluorescent light source assembly, the blue laser light emitted by the blue laser light source 103 can sequentially pass through the second homogenizing element and the second collimating lens group 112, be reflected by the laser-fluorescent light combining element 106 to the phosphor plate 104, excite the fluorescent light on the phosphor plate 104, pass through the third collimating lens group 115 to the beam splitter 110 and the laser-fluorescent light combining element 106, and then be reflected by the laser-fluorescent light combining element 106 to the fly-eye module 105.

[0068] The embodiment of the present application also provides a projection device, which can be a projector. The projection device includes the projection light source 100 and a display chip disposed at the light exit side of the projection light source 100. It can be understood that the projection light source 100 can realize a truly continuous ultra-wide spectrum light source, achieve a truly close-to-no-speckle light source system, have high brightness and high color gamut, and improve the projection effect of the projection device.

[0069] The projection light source 100 and the projection device provided by the embodiments of the present application have the three-color laser light source 101, the red LED light source 102 and the blue laser light source 103, wherein the blue laser light is converted into green fluorescence by the fluorescent powder plate 104. The green fluorescence and the red light are different from the laser light, and do not have the speckle problem, so the green fluorescence, the red light and the three-color laser light are mixed in the compound eye module 105, the high brightness and the high color gamut of the three-color laser light source 101 can be maintained, the green fluorescence and the red light can be supplemented, the real continuous ultra-wide spectrum light source is realized, the real near-speckle-free light source system is achieved, the viewing comfort of the human eye is greatly enhanced, and a more healthy viewing environment is provided for the user.

[0070] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0071] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0072] The projection light source and the projection device provided by the embodiments of the present application are described in detail. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only for helping to understand the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application range can be changed, and the above description of the present application should not be understood as the limitation of the present application.

Claims

1. A projection light source, comprising: A three-color laser source, wherein the three-color laser source is used to emit red laser, blue laser and green laser; A red LED light source, wherein the red LED light source is used to emit red light; A blue laser source, wherein the blue laser source is used to emit blue laser light; A phosphor plate is disposed on the light-emitting side of the blue laser light source, and the phosphor plate is used to convert the blue laser into green fluorescence; A compound eye module is disposed on the light-emitting side of the three-color laser light source, the red LED light source, and the phosphor plate. The compound eye module is used to transmit the red laser, the blue laser, the green laser, the red light, and the green phosphor light after homogenization.

2. The projection light source according to claim 1, wherein, It also includes a laser fluorescence combining element, wherein the side of the laser fluorescence combining element facing the phosphor plate and the red LED light source is a reflective surface, which is used to reflect the green fluorescence and the red light to the compound eye module; the laser fluorescence combining element is provided with a through hole, through which the red laser, blue laser and green laser can pass and exit to the compound eye module.

3. The projection light source according to claim 2, wherein, The laser phosphor combining element includes a transparent substrate and a reflective film. The reflective film is disposed on one side of the transparent substrate. The reflective film has through holes or regional film layers. The reflective film faces the phosphor plate and the light-emitting side of the red LED light source. The reflective film forms the reflective surface.

4. The projection light source according to claim 3, wherein, It also includes a second antireflective film, which is disposed on the side of the transparent substrate away from the reflective film. The projection of the second antireflective film on the transparent substrate is greater than or equal to the projection of the regional film layer on the transparent substrate. Light can pass through the second antireflective film, the transparent substrate, and the regional film layer in sequence to enter the compound eye module.

5. The projection light source according to claim 2, wherein, It also includes a focusing lens unit, which is disposed between the three-color laser source and the laser fluorescence combining element. The focusing lens unit is used to adjust the cross-sectional area of ​​the beam emitted from the three-color laser source.

6. The projection light source according to claim 5, wherein, It also includes a first light-diffusing element, which is disposed between the focusing lens unit and the three-color laser source.

7. The projection light source according to claim 2, wherein, It also includes a first relay lens, which is disposed between the three-color laser source and the laser fluorescence combining element.

8. The projection light source according to claim 7, wherein, It also includes a single focusing lens unit, which is disposed between the three-color laser source and the laser fluorescence combining element, and the first relay lens is disposed between the focusing lens unit and the three-color laser source.

9. The projection light source according to claim 7, wherein, It also includes multiple focusing lens units, which are disposed between the three-color laser source and the laser fluorescence combining element, and the first relay lens is disposed on at least one of the focusing lens units on the side close to the three-color laser source.

10. The projection light source according to claim 2, wherein, It also includes a beam splitter having a first beam splitter surface and a second beam splitter surface facing each other. The first beam splitter surface faces the blue laser source and the phosphor plate, and the second beam splitter surface faces the laser-fluorescent combining element. The blue laser is reflected to the phosphor plate via the first beam splitter surface, and the green fluorescence emitted from the phosphor plate is projected from the first beam splitter surface to the second beam splitter surface and then to the laser-fluorescent combining element, and then reflected by the laser-fluorescent combining element to the compound eye module.

11. The projection light source according to claim 10, wherein, The second beam-splitting surface faces the red LED light source. The red light emitted from the red LED light source is reflected by the second beam-splitting surface to the laser-fluorescent light-combining element, and then reflected by the laser-fluorescent light-combining element to the compound eye module.

12. The projection light source according to claim 10, wherein, It also includes a first collimating lens group, which is disposed between the red LED light source and the beam splitter.

13. The projection light source according to claim 10, wherein, It also includes a second collimating lens group, which is disposed between the blue laser source and the beam splitter.

14. The projection light source according to claim 13, wherein, It also includes a second light homogenizer, which is disposed between the blue laser source and the second collimating lens.

15. The projection light source according to claim 10, wherein, It also includes a second relay lens, which is disposed between the blue laser source and the beam splitter.

16. The projection light source according to claim 10, wherein, It also includes a third collimating lens group, which is disposed between the phosphor plate and the beam splitter.

17. The projection light source according to claim 10, wherein, It also includes a third relay lens, which is disposed between the laser fluorescence combining element and the beam splitter.

18. The projection light source according to claim 1, wherein, The compound eye module also includes a compound eye lens and a fourth relay lens. The compound eye lens is disposed on the light-emitting side of the three-color laser light source, the red LED light source and the phosphor plate, and the fourth relay lens is disposed on the light-emitting side of the compound eye lens.

19. The projection light source according to claim 1, wherein, There are multiple tri-color laser light sources.

20. A projection device comprising a projection light source and a display chip, the display chip being disposed on the light-emitting side of the projection light source, the projection light source comprising: A three-color laser source, wherein the three-color laser source is used to emit red laser, blue laser and green laser; A red LED light source, wherein the red LED light source is used to emit red light; A blue laser source, wherein the blue laser source is used to emit blue laser light; A phosphor plate is disposed on the light-emitting side of the blue laser light source, and the phosphor plate is used to convert the blue laser into green fluorescence; A compound eye module is disposed on the light-emitting side of the three-color laser light source, the red LED light source, and the phosphor plate. The compound eye module is used to transmit the red laser, the blue laser, the green laser, the red light, and the green phosphor light after homogenization.

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